
PM5317 SPECTRA-9953 Telecom Standard Product Data Sheet
Release
Proprietary and Confidential to PMC-Sierra, Inc., and for its customers’ internal use.
Document No.: PMC-2000741, Issue 5
34
7
Loopback Modes
7.1
Line Loopback Modes
The SPECTRA-9953 device supports SONET STS-1/STM-0 terminal loopback (SSLLB).
When enabled, the receive SVCA output is fed back to the Add bus SSI block input. The Drop
bus data stream is still valid when this type of loopback is enabled.
The SPECTRA-9953 device does not support SONET facility loopback (line loopback before
de-scrambling). This feature should be implemented within the external SERDES device.
Figure 4 Line Loopback Modes
R
R
R
R
R
R
R
B
SBER
R(4)
(4)
PHASE_INIT[4:1]
PHASE_ERR[4:1]
TxLVRef
TXLV
(4)
RRMP
(4)
RRMP
(4)
RRMP
(4)
RRMP
(4)
TRMP
(4)
TRMP
(4)
TRMP
(4)
TRMP
(4)
TTTP
(4)
T
T
T
T
SYNC_ERR[4:1]
S
SIPO
(4)
SIPO
(4)
SIPO
(4)
SIPO
(4)
RXLV
(4)
RXLV
(4)
RXLV
(4)
RXLV
(4)
S
PISO
(4)
PISO
(4)
SIPO
(4)
PISO
(4)
TXLV
(4)
TXLV
(4)
TXLV
(4)
T
T
T
DD1[3:0]+/-
DD2[3:0]+/-
DD3[3:0]+/-
DD4[3:0]+/-
AD1[3:0]+/-
CSU
AD2[3:0]+/-
AD3[3:0]+/-
AD4[3:0]+/-
TXLV
(4)
TxLVRef
RXLV
(4)
RXLV
(4)
RXLV
(4)
RXLV
(4)
TXLV
(4)
TXLV
(4)
TXLV
(4)
DRU
(4)
DRU
(4)
DRU
(4)
DRU
(4)
R8TD
(4)
R8TD
(4)
R8TD
(4)
R8TD
(4)
PISO
(4)
T8TE
(4)
PISO
(4)
T8TE
(4)
PISO
(4)
PISO
(4)
T8TE
(4)
T8TE
(4)
DFP
AFP
SYSCLK
TRCPCK, TRCPFP
TRCPD[4:1]
SARC-48
(4)
RSALM[4:1]
RALM[4:1]
RRCPD[4:1]
RRCPCK, RRCPFP
D
C
A
A
W
R
I
R
M
JTAG
T
T
T
T
T
Microprocessor
Q
TXFPO
TXFPI
RXDATA[4:1][3:0]+/-
RXCLK[4:1]+/-
TXDATA[4:1][3:0]+/-
TXCLK[4:1]+/-
TXCLK_SRC[4:1]+/-
P
P
RTTP
(16)
RHPP
(4)
RHPP
(4)
RHPP
(4)
RHPP
(4)
SVCA
(4)
SVCA
(4)
SVCA
(4)
SVCA
(4)
THPP
(4)
THPP
(4)
THPP
(4)
THPP
(4)
TTTP
(16)
SVCA
(4)
SVCA
(4)
SVCA
(4)
SVCA
(4)
TPAISFP
TPAIS[4:1]
ACMP
S
S
I
SHPI
(4)
SHPI
(4)
SHPI
(4)
SHPI
(4)
S
S
I
DCMP
DFPO
s